１　引言核子称是利用γ射线吸收的原理，对输送机传送的物料进行非接触性测量的仪表。其不受物料的高温、腐蚀性、皮带磨损、张力、振动、惯性、刚度、跑偏等因素的影响，可广泛用于化工、煤炭、采矿、冶金、电力、建材、港口、食品加工等行业部门中的盐、碱、煤、焦炭、... 1 Introduction Nuclear name is the use of γ-ray absorption principle, the conveyor conveyor to conduct non-contact measurement of the instrument. It can be widely used in chemical, coal, mining, metallurgy, electric power, building materials, ports, food processing and other industries due to its high temperature, corrosiveness, belt wear, tension, vibration, inertia, rigidity and deviation. Department of salt, alkali, coal, coke, ...